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Granite Surface Plate

Manufacturer part: 2245A48

With flatness tolerances thinner than a strand of hair, these plates give you the flattest possible surface for accurate measurements. They’re typically used as a reference plane to inspect finished products and calibrate precision measuring tools, such as height gauges and dial indicators. Unlike metal plates, these granite plates won’t rust or interfere with nearby electronics. They also won’t warp when temperatures fluctuate. To maintain their flatness and finish, rotate plates regularly and apply granite cleaner (not included) to remove particles without leaving a residue.Also Available: Other plate sizes. Please order 2245A999 and specify grade, length, width, thickness, and with or without ledges.Black—Harder and denser than red plates to handle heavier loads, such as large bearings and other machined parts.Inspection-Grade A Plate—Your go-to for general inspections and quality-control work. These plates are slightly less precise than grade AA plates with double the flatness tolerance.Rectangular Plate with Two Ledges—Choose these plates if you need to mount fixtures and instruments with a clamp.Surface Plate Covers—Prevent dust and debris from accumulating on plates when you’re not using them.

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